The scientific description of the customs of individual peoples and cultures.
Et·som·ni·a (/etˈsämnēə/), noun, 1. a sleep disorder caused by obsessive Etsy browsing. 2. The surprising arrival of weird handmade merchandise ordered when one is only half conscious. (True story.) 3. An excuse for me to be an obnoxious, snarky New Yorker once per week.